A magnetic field-enhanced plasma jet liquid surface discharge device

Abstract

This utility model relates to the field of plasma technology and discloses a magnetic field-enhanced plasma jet liquid surface discharge device. It includes a liquid reservoir, a grounding electrode, and a plasma jet injector. One end of the grounding electrode is inserted into the liquid reservoir, and the other end is grounded. The plasma jet injector includes a discharge electrode, a frame, a plasma generating tube, and magnets. One end of the plasma generating tube is connected to the frame, and the other end is connected to a nozzle. The discharge electrode passes through the frame and the plasma generating tube, with one end of the discharge electrode extending out of the frame and connected to the output terminal of a power supply. Multiple magnets are located around the discharge electrode near the nozzle inside the plasma generating tube. This utility model can stably generate a plasma jet. The strong magnets inside the plasma jet injector enhance plasma discharge, effectively increasing the discharge intensity. This utility model has a simple structure and is compact and convenient to use.

Description

Technical Field

[0001] This invention belongs to the field of plasma technology, specifically relating to a magnetic field-enhanced plasma jet liquid surface discharge device. Background Technology

[0002] In recent years, atmospheric pressure low-temperature plasma jets have been widely used in materials modification, surface cleaning, disinfection and sterilization, biomedicine, and plasma-activated liquid preparation due to their unique ability to generate active particles and their good environmental adaptability.

[0003] Conventional plasma jet devices typically employ a single-electrode or dual-electrode structure, exciting gas molecules through dielectric barrier discharge, sliding discharge, or pulsed discharge to form a plasma plume rich in active substances. When the jet comes into contact with a liquid surface, it can induce multiphase interfacial reactions, generating a large number of reactive oxygen species (RONS), thereby enabling the regulation of liquid properties.

[0004] When a plasma jet interacts with a liquid surface, the resulting plasma-liquid interface is the core region for energy transfer and mass exchange. However, in practical applications, water surface discharge still has several shortcomings: First, the plasma plume is prone to diffusion loss at the gas-liquid interface, resulting in low efficiency in the transfer of effective active species into the liquid; second, the liquid surface has a strong disturbance effect on the discharge process, easily causing the plasma plume to deviate or contract, affecting discharge stability; third, the uneven distribution of the local electric field during water surface discharge easily leads to transient micro-discharges or local overheating, thereby reducing the uniformity and controllability of the active material. These factors make it difficult for traditional jet water surface discharge devices to maintain good stability and repeatability while ensuring the generation of high-intensity active materials.

[0005] In recent years, researchers have proposed using external magnetic fields to improve the discharge characteristics and active material transport performance of plasma. The introduction of a magnetic field can effectively alter the trajectory of charged particles, increasing the probability of collisions between electrons and neutral gas molecules, thereby enhancing ionization efficiency and extending the plasma plume length. Simultaneously, the magnetic field's regulation of electron energy distribution within the plasma can make the reaction process more uniform, reducing the incidence of localized overheating and unstable discharges at the interface. More importantly, the magnetic field can guide the diffusion direction of charged particles, increasing the reaction intensity and mass exchange efficiency at the gas-liquid interface, thus significantly increasing the concentration and stability of active materials in the liquid. However, existing magnetic field-assisted plasma technologies mostly focus on gas-phase discharge or plasma surface treatment. Research on magnetic field coupling for plasma jet water surface discharge is still in the exploratory stage, lacking a technical solution that can balance discharge stability and device structural simplicity. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a plasma jet liquid surface discharge device with enhanced magnetic field. This invention can stably generate plasma jets. The strong magnet inside the plasma jet device can enhance plasma discharge and effectively improve the discharge intensity of the plasma. This invention has a simple structure and is compact and convenient.

[0007] This utility model provides the following technical solution: A magnetic field-enhanced plasma jet liquid surface discharge device is provided, comprising a liquid reservoir, a grounding electrode, and a plasma jet generator; One end of the grounding electrode is inserted into the liquid reservoir, and the other end is grounded; The plasma jet generator includes a discharge electrode, a frame, a plasma generating tube, and a magnet; One end of the plasma generating tube is connected to the frame, and the other end is connected to a nozzle; The discharge electrode passes through the frame and the plasma generating tube, with one end of the discharge electrode extending out of the frame and connected to a power source. The plasma generating tube has multiple magnets located around the discharge electrodes at one end near the nozzle.

[0008] Furthermore, the plasma generating tube includes a protective tube and an insulating tube nested together, the magnet is a ring magnet, the magnet is nested between the protective tube and the insulating tube, one end of the protective tube and the insulating tube is connected to the skeleton, the magnet is a ring magnet, the magnet is nested between the protective tube and the insulating tube, and the discharge electrode is placed in the center of the insulating tube.

[0009] In the above technical solution, the plasma generating tube has two layers. The protective tube can provide all-round protection for the device; the insulating tube is made of insulating material, which can isolate the discharge electrode and the protective tube, thereby improving the safety of the device during discharge.

[0010] Furthermore, an electrode support is provided between the discharge electrode and the insulating tube.

[0011] Furthermore, the electrode support is gear-shaped.

[0012] Furthermore, the nozzle is a ceramic nozzle.

[0013] In the above scheme, the nozzle is made of high temperature resistant, oxidation resistant and corrosion resistant ceramic material, which can prevent the protective tube from arcing with the discharge electrode; it can constrain and guide the plasma jet to realize the function of ejecting plasma; it can achieve long-term discharge stability and improve service life.

[0014] Furthermore, the frame is connected to a quick connector, which has an air inlet and is connected to the frame and the insulating tube.

[0015] Furthermore, the power source is a DC power source or an AC power source.

[0016] In the above technical solution, a specific gas inlet is used, which can discharge using different working gases such as air, argon and nitrogen, or discharge directly without applying a working gas; it can be matched with various types of plasma power supplies, such as DC power supplies, high-frequency power supplies and pulse power supplies, to meet the needs of different application scenarios.

[0017] Furthermore, it also includes a clamping platform for clamping the plasma jet generator.

[0018] Furthermore, the liquid reservoir is provided with a cover, which has a first opening and a second opening. The plasma generating tube and the grounding electrode are respectively inserted into the liquid reservoir through the first opening and the second opening.

[0019] Furthermore, the liquid reservoir is a single-cavity container or a multi-cavity container.

[0020] Compared with the prior art, the beneficial effects of this utility model are: (1) In this invention, the power supply is connected to the discharge electrode, and the grounding electrode is inserted into the liquid storage tank. An electric field is established between the discharge electrode and the liquid to ionize the gas in the gap, thereby forming plasma and triggering the interaction between the plasma and the liquid. On this basis, a strong magnet is added to the plasma jet nozzle. The strong magnetic field generated by the strong magnet can effectively constrain the charged particles in the plasma and concentrate them below the nozzle, effectively increasing the length and density of the plasma jet. The plasma discharge is enhanced by the magnetic field, effectively increasing the discharge intensity of the plasma. This invention can achieve stable, continuous and efficient plasma jet liquid surface discharge. (2) The present invention has a simple structure, is small and portable, easy to manufacture and low cost. It can achieve long-term stable operation, has strong adaptability and can be applied in different fields. For example, in environmental governance, it can be used to efficiently degrade water pollutants. In the biomedical field, it can achieve non-destructive disinfection and promote cell repair. In the agricultural field, it can be used to prepare activated water to improve seed germination rate and crop stress resistance. It has good industrialization and promotion value. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the magnetic field-enhanced plasma jet liquid surface discharge device of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the structure of the magnetic field-enhanced plasma jet liquid surface discharge device of Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of the internal structure of the plasma generating tube in Embodiment 2 of this utility model; Figure 4 This is a discharge pattern diagram of the magnetic field-enhanced plasma jet liquid surface discharge device of Embodiment 2 of this utility model in an atmospheric environment. Figure 5 The discharge conditions of the magnetic field-enhanced plasma jet liquid surface discharge device of Embodiment 3 of this utility model when a DC high voltage power supply is applied are shown: (a) discharge without working gas; (b) air discharge; (a) argon discharge. Figure 6 The discharge conditions of the magnetic field-enhanced plasma jet liquid surface discharge device of Embodiment 4 of this utility model when a high-frequency high-voltage AC power supply is applied are shown: (a) discharge without working gas; (b) air discharge; (a) argon discharge. Figure 7 This is a schematic diagram of the structure of the integrated liquid storage device used in Embodiment 5 of this utility model.

[0022] The following are labeled in the diagram: 1. Liquid reservoir; 2. Grounding electrode; 3. Discharge electrode; 4. Frame; 5. Plasma generator tube; 6. Magnet; 7. Power supply; 8. Plasma-liquid discharge; 9. Protective tube; 10. Insulating tube; 11. Nozzle; 12. Quick connector; 13. Electrode support; 14. Plasma jet injector; 15. First cover; 16. First opening; 17. Second opening; 18. Clamping platform; 19. Integrated liquid reservoir; 20. Second cover; 21. Third cover. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0024] It should be noted that in the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] Example 1

[0027] This embodiment provides a magnetic field-enhanced plasma jet liquid surface discharge device, including a liquid reservoir 1, a grounding electrode 2, a plasma jet 14, and a first cover 15.

[0028] like Figure 1 The diagram shows the schematic of a magnetically enhanced plasma jet liquid surface discharge device. One end of the grounding electrode 2 is inserted into the liquid surface of the reservoir 1, and the other end is grounded. The plasma jet generator 14 includes a discharge electrode 3, a frame 4, a plasma generating tube 5, and magnets 6. One end of the plasma generating tube 5 is connected to the frame 4, and the other end is connected to a nozzle 11. The discharge electrode 3 passes through the frame 4 and the plasma generating tube 5, with one end of the discharge electrode 3 extending out of the frame 4 and connected to the output terminal of the power supply 7. Inside the plasma generating tube 5, near the nozzle 11, are multiple magnets 6 located around the discharge electrode 3. There is a distance between the plasma generating tube 5 and the liquid. A quick connector 12 is installed on one side of the frame 4, which can connect to different working gases and be used in different working environments.

[0029] In this embodiment, the liquid reservoir 1 is provided with a cover 15, and the cover 15 is provided with a first opening 16 and a second opening 17. The plasma generating tube 5 and the grounding electrode 2 are respectively inserted into the liquid reservoir 1 through the first opening 16 and the second opening 17.

[0030] When power supply 7 is turned on, an electric field is established between discharge electrode 3 and the liquid to ionize the gas in the gap, thereby forming plasma and initiating the interaction between plasma and liquid, i.e., plasma-liquid discharge 8. A built-in magnet 6 is installed inside the plasma jet injector 14. The strong magnetic field generated by magnet 6 can effectively confine charged particles in the plasma and concentrate them below nozzle 11, effectively increasing the length and density of the plasma jet, further enhancing the interaction between plasma and liquid, and effectively increasing the discharge intensity of the plasma, enabling the device to achieve stable, continuous, and efficient plasma jet liquid surface discharge.

[0031] Example 2

[0032] This embodiment provides a magnetic field-enhanced plasma jet liquid surface discharge device. In order to facilitate the clamping of the plasma jet 14, this embodiment also includes a clamping platform 18 based on embodiment 1.

[0033] like Figure 2As shown, the clamping platform 18 is equipped with grippers for clamping the skeleton 4 of the plasma jet generator 14; in this embodiment, the liquid reservoir 1 is a beaker, and the first cover 15 of the liquid reservoir 1 has a first opening 16 and a second opening 17. The diameter of the first opening 16 is 15 mm, which is used to insert the plasma generating tube 5 of the plasma jet generator 14, and the diameter of the second opening 17 is 1.7 mm, which is used to insert the grounding electrode 2. A certain gas atmosphere can be formed inside the liquid reservoir 1, thereby realizing directional application.

[0034] like Figure 3 As shown, the plasma jet generator 14 includes a discharge electrode 3, a frame 4, a plasma generating tube 5, a nozzle 11, and a magnet 6. In this embodiment, the frame 4 is made of insulating material and is formed by 3D printing. It is used to fix and install all parts. A hole is left in the center of the frame 4, into which the discharge electrode 3 can be inserted. One end of the discharge electrode 3 can be installed inside the plasma generating tube 5, and the other end is connected to the output terminal of the power supply 7. In this embodiment, the discharge electrode 3 is a tungsten needle electrode with a length of 150 mm and a diameter of 1.6 mm. Tungsten is a chemically stable metal that is not easily oxidized. Except for a mixture of hydrofluoric acid and concentrated nitric acid, it is not corroded by common acid, alkali, oxidizing agents, or other chemical reagents. Therefore, it can be used for a long time as a discharge electrode.

[0035] The side of the frame 4 is equipped with a quick connector 12. In this embodiment, the quick connector 12 is a 6 mm quick connector. The frame 4 has an M6 threaded hole, allowing one end of the quick connector 12 to be screwed into the frame 4 and communicate with the frame 4 and the insulating tube 10. The other end of the quick connector 12 has an air inlet, which can be connected to an air pipe to access different types of working gases. The air inlet channel of the frame 4 communicates with the holes inside the frame 4. After the gas enters from the quick connector 12, it can enter the insulating tube 10 through the gap between the frame 4 and the discharge electrode 3. In some embodiments, to prevent gas leakage, the gap between the discharge electrode 3 and the frame 4 is sealed at the end where the discharge electrode 3 contacts the power supply 7.

[0036] One end of the plasma generating tube 5 is connected to the end of the frame 4, and the other end is placed above the liquid surface of the reservoir 1, as shown below. Figure 3The plasma generating tube 5 shown has an internal structure consisting of two tube layers. The outermost layer is a protective tube 9, which in this embodiment is made of stainless steel. The protective tube 9 has an outer diameter of 12 mm, an inner diameter of 10 mm, and a length of 100 mm. The protective tube 9 provides all-around protection and impact resistance for the plasma generating tube 5, enabling long-term use. Inside the protective tube 9 is an insulating tube 10, which is made of insulating material. In this embodiment, a quartz tube is used. The insulating tube 10 has an outer diameter of 6 mm, an inner diameter of 5 mm, and a length of 100 mm. The insulating tube 10 isolates the internal discharge electrode 3 from the external protective tube 9. After the working gas enters the gap between the frame 4 and the discharge electrode 3, it diffuses into the interior of the insulating tube 10, filling the space between the discharge electrode 3 and the insulating tube 10. In this embodiment, the discharge electrode 3 is a tungsten needle electrode, and the interior of the insulating tube 10 is the tip of the tungsten needle discharge electrode. In order to ensure that the discharge electrode 3 is located in the center of the insulating tube 10, a gear-shaped electrode support 13 is also installed on the discharge electrode 3. The working gas will diffuse through the gear gap of the electrode support 13 and then fill the interior of the insulating tube 10.

[0037] A nozzle 11 is installed at the bottom of the plasma generating tube 5 for ejecting plasma jets. In this embodiment, a ceramic nozzle with an inner diameter of 7 mm is used. The nozzle 11 is fitted onto one end of the insulating tube 10 and is tightly bonded with UV-curable adhesive. One end of the protective tube 9 is also bonded to the nozzle 11 with UV-curable adhesive. In this embodiment, the use of a ceramic nozzle has the following advantages: (1) Electrical insulation. Ceramic materials themselves have excellent electrical insulation properties. Adding a ceramic nozzle can prevent the plasma from directly contacting the metal electrode or external conductive object, thereby reducing the risk of electric shock and improving the safety and stability of the discharge process; (2) Constraining and guiding the plasma jet. The ceramic nozzle can make the jet more concentrated and stable, avoid excessive diffusion of the plasma at the outlet, help enhance the penetration and action distance of the jet, and improve the activation efficiency; (3) Enhancing the airflow dynamics effect. The nozzle design can form a contraction effect on the working gas, increase the gas flow rate and turbulence intensity, make the plasma mix more fully with the outside air or water, which is conducive to the generation and transport of active species and enhances the interaction effect between plasma and liquid; (4) Thermal stability and corrosion resistance. Ceramic materials are resistant to high temperature, ultraviolet and chemical corrosion, avoiding nozzle damage caused by long-term discharge and improving the service life of the device; (5) Improve discharge uniformity. The dielectric properties of ceramic materials can form a local electric field distribution optimization at the nozzle outlet, reducing discharge deviation or instability; making the plasma jet more uniform, which helps to improve the consistency of the activated water composition; (6) Convenient replacement and maintenance.

[0038] Multiple magnets 6 are installed between the protective tube 9 and the insulating tube 10, near the nozzle 11. In this embodiment, the magnets 6 are strong magnets with an outer diameter of 9 mm, an inner diameter of 6.3 mm, and a height of 5 mm each. After the power supply 7 is turned on, the magnets 6 can provide a strong magnetic field to further enhance the intensity of the plasma. In some possible embodiments, three ring-shaped strong magnets can be installed to enhance the magnetism.

[0039] In some embodiments, the magnetic field-enhanced plasma jet liquid surface discharge device provided in Example 1 is used to conduct discharge tests in an atmospheric environment. When argon is used as the working gas, the flow rate is 3 standard liters per minute (slm), and the power supply 7 is a high-frequency, high-voltage AC power supply with an output voltage of 6 kV and a frequency of 16 kHz, as shown... Figure 4 As shown in (a), a 45 mm plasma jet can be generated in air; without adding magnet 6, as Figure 4 As shown in (b), only a plasma jet length of 28 mm can be observed, and its shape is relatively diffuse with a low density. The plasma jet length of the device with the added magnet is 1.6 times that of the device without the added magnet. This is because a built-in strong magnet is installed in the plasma generating tube 5 of this invention. The strong magnetic field generated by the strong magnet can effectively confine the charged particles in the plasma and concentrate them below the nozzle 11, effectively increasing the length and density of the plasma jet. This further confirms that the magnetic field-enhanced plasma jet liquid surface discharge device provided by this invention can effectively enhance the plasma jet intensity.

[0040] Example 3

[0041] This embodiment uses the magnetic field-enhanced plasma jet liquid surface discharge device provided in Embodiment 1 or 2, wherein the power supply 7 is a DC high voltage power supply.

[0042] like Figure 5 As shown in (a), power supply 7 uses a DC high-voltage power supply with an output voltage of 6 kV. No working gas is introduced, allowing for direct observation of the plasma jet's discharge status; as... Figure 5 (b) and Figure 5 As shown in (c), if air or argon is introduced as the working gas at a flow rate of 2 slm, the discharge status of the plasma jet injector 14 can be directly observed. Therefore, the device provided in this embodiment can use various types of working gases or no gas to discharge, and can stably generate plasma to process liquids under a DC high-voltage power supply.

[0043] Example 4

[0044] This embodiment uses the magnetic field-enhanced plasma jet liquid surface discharge device provided in Embodiment 1 or 2, wherein the power supply 7 adopts a high-frequency high-voltage AC power supply.

[0045] like Figure 6 As shown in (a), in this embodiment, when the power supply 7 uses a high-frequency, high-voltage AC power supply, the output voltage is adjusted to 6kV and the output frequency is 16 kHz. No working gas is introduced, and the discharge status of the plasma jet generator 14 can be directly observed; Figure 6 (b) and Figure 6 As shown in (c), when air or argon is introduced as the working gas, the flow rate is 2 slm, and the discharge status of the plasma jet generator 14 can be directly observed. Therefore, this invention can use various types of working gases or no gas to discharge, and can stably generate plasma to process liquids under a high-frequency, high-voltage AC power supply.

[0046] Depend on Figure 5 and Figure 6 The comparison shows that the plasma discharge phenomenon generated by using a high-frequency, high-voltage AC power supply is stronger than that generated by using a DC power supply. The magnetic field-enhanced plasma jet liquid surface discharge system provided by this invention can generate stable plasma on the water surface through magnetic field enhancement, effectively improving the plasma discharge intensity. This invention can be paired with different high-voltage plasma power supplies, adaptable to different types of working gases, or even without a working gas, to meet the working requirements of different application scenarios.

[0047] Example 5

[0048] This embodiment uses the magnetic field-enhanced plasma jet liquid surface discharge system provided in Embodiment 1. In this embodiment, the liquid reservoir 1 is replaced with an integrated liquid reservoir 19. In this embodiment, the integrated liquid reservoir 19 is an integrated beaker with two chambers. The bottoms of the two chambers are connected, and a filter element is installed at the connection point to achieve filtration and collection of specific liquids. Each chamber is filled with liquid. The plasma jet injector 14 is inserted into one chamber through the second cover 20, maintaining a certain distance from the liquid surface. The grounding electrode 2 is inserted below the liquid surface of the other chamber through the third cover 21.

[0049] The power supply 7 uses a DC high-voltage power supply, and the positive output terminal of the power supply 7 is connected to the discharge electrode 3. In this embodiment, the ground electrode 2 is a tungsten needle, and the negative output terminal of the power supply 7 is inserted into the ground electrode 2. When the power supply output is greater than 6 kV, plasma will be generated between the plasma jet generator 14 and the liquid.

[0050] The device provided by this invention has a simple structure and wide adaptability. The materials used are durable and the entire system can operate stably for a long time. By introducing an internal magnetic field to enhance plasma discharge, the efficiency of plasma in treating liquids is improved, which can promote the application of plasma in various fields. For example, in environmental remediation, it can be used to efficiently degrade water pollutants; in the biomedical field, it can achieve non-destructive disinfection and promote cell repair; and in the agricultural field, it can be used to prepare activated water to improve seed germination rate and crop resistance, thus possessing good industrialization and promotion value.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A magnetic field-enhanced plasma jet liquid surface discharge device, characterized in that, It includes a liquid reservoir (1), a grounding electrode (2), and a plasma jet generator (14). One end of the grounding electrode (2) is inserted into the liquid reservoir (1), and the other end is grounded; The plasma jet generator (14) includes a discharge electrode (3), a frame (4), a plasma generating tube (5), and a magnet (6). One end of the plasma generating tube (5) is connected to the frame (4), and the other end is connected to a nozzle (11). The discharge electrode (3) passes through the skeleton (4) and the plasma generating tube (5), and one end of the discharge electrode (3) near the skeleton (4) extends out of the skeleton (4) and is connected to the power supply (7). The plasma generating tube (5) has multiple magnets (6) located around the discharge electrode (3) at one end near the nozzle (11).

2. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 1, characterized in that, The plasma generating tube (5) includes a protective tube (9) and an insulating tube (10) fitted together. One end of the protective tube (9) and the insulating tube (10) is connected to the skeleton (4). The magnet (6) is a ring magnet. The magnet (6) is fitted between the protective tube (9) and the insulating tube (10). The discharge electrode (3) is placed in the center of the insulating tube (10).

3. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 2, characterized in that, An electrode support (13) is provided between the discharge electrode (3) and the insulating tube (10).

4. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 3, characterized in that, The electrode support (13) is gear-shaped.

5. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 1, characterized in that, The nozzle (11) is a ceramic nozzle.

6. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 2, characterized in that, The frame (4) is connected to a quick connector (12) via a threaded connection. The quick connector (12) is provided with an air inlet and is connected to the frame (4) and the insulating tube (10).

7. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 1, characterized in that, The power source (7) is a DC power source or an AC power source.

8. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 1, characterized in that, It also includes a clamping platform (18) for clamping the plasma jet generator (14).

9. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 1, characterized in that, The reservoir (1) is provided with a cover (15), the cover (15) is provided with a first opening (16) and a second opening (17), the plasma generating tube (5) and the grounding electrode (2) are respectively inserted into the reservoir (1) through the first opening (16) and the second opening (17).

10. The magnetic field-enhanced plasma jet liquid surface discharge device according to claim 1, characterized in that, The liquid reservoir (1) is a single-cavity container or a multi-cavity container.

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